arm64: zynqmp: Revert usb node drive strength and slew rate for zcu106

arm64: zynqmp: Revert usb node drive strength and slew rate for zcu106

On a few zcu106 boards USB devices (Dell MS116 USB Optical Mouse, Dell USB
Entry Keyboard) are not enumerated on linux boot due to commit
'b8745e7eb488 ("arm64: zynqmp: Fix usb node drive strength and slew
rate")'.

To fix it as a workaround revert to working version and then investigate
at board level why drive strength from 12mA to 4mA and slew from fast to
slow is not working.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/14d3408cf547ac188c07c10abb0ddfaac9d915c4.1756803198.git.michal.simek@amd.com